Hello
Greetings! We went through your project description and came to the conclusion that you require a user authentication module for your web shop. You have a product which you distributed freely and as it has gone popular now you want to charge some fee to the users of the product. We can implement the user subscription module for your web shop and this project needs technical skill set like Testing, PHP, JS, JQuery CSS, HTML, MYSQL and SQL together with strong algorithmic/logical sense for successful delivery.
Perfexus team possesses necessary skill set and is highly interested in doing this project. We are a group of individuals having expertise in diverse sectors like Product Development, IT Services, Finance, Marketing, Sales, etc. We work in field of programming, testing, documentation, and data entry.
We can deliver your work as per requirement which will be professional, accurate and presentable. Based on our experience we can also suggest some changes which will add value to your application.
If you show interest we can discuss this project further.
Thanks
Perfexus Team